The reality babe, 30, will jet to South Africa at the end of the month to take part.
It is her first major TV role outside of Britain and could launch her as a worldwide star.
A source close to Vicky said: “This is a very big deal. It will give her the chance to reach a whole new audience and prove she can be a hit outside of the UK.”
Vicky will net £250,000 for taking part in the series, which is filmed in the Kruger National Park.
“This is a very big deal”
She is due to live in camp for up to four weeks.
British cricketer Freddie Flintoff appeared on the first series of the Oz version and won it.
Since then stars including Shane Warne have done it.
A TV insider said: “The Australian version is really popular with viewers.
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“Producers saw her on the UK show and loved her.
“They’ve never asked a contestant from the UK series before but they couldn’t resist asking her to take part because they think she’ll be brilliant.”
Vicky won I’m A Celebrity in 2015 and has gone on to carve out a career as a TV presenter.
She fronted the jungle spin-off show in 2016 and regularly appears on This Morning.
Her image these days is a world away from her past as a star of Geordie Shore.
Fans saw her have sex on the MTV series as well as getting involved in boozy arguments with co-stars.